| Year | 1990 |
| Date | 05-Jan |
| Volume | 164 |
| Issue | 3,864 |
| Page | 28 |
| Category | Nautical |
| Part | 2 |
| Title | Borderer. A twin cylinder marine steam engine design suitable for 1/2 in. to 5/8 in. Bore and Stroke |
| Author | John P.Bertinat |
| Notes | Valve chest and cover and slide valve, the cylinder covers, making small studs, trunk guides |